First of all which one is good for WooCommerce newbies? This one is not too favorable Yoast SEO: simple and easy to use, suitable for newbies to deploy quickly. Rank Math: more features, more powerful, suitable for sellers with SEO goals and willing to set it up in depth. Three short answers to questions: Can I migrate between the two? Yes, Rank Math offers a migration tool for a safer process. Is the Rank Math backend complex? It is a bit complicated at the beginning, but there is a "simple mode" which is suitable for gradual use. Do plugins affect performance? Possibly, it is recommended to enable only necessary functions to avoid conflicts with caching plugins.